Thanks for the words of support guys. The bad part is nobody is even interviewing due to covid. We will get through it and hopefully without having to tap into the 3 wheeler fund.
So last night I was thinking about the thread engagement and strength of the aluminum plate to carry the load of the Miata transmission. Since I got time and some steel hex stock, I decided to make threaded bushings and press fit them into the plate. They are M12 thread and provide 3/4" of steel thread engagement. Much better to my liking now. I also had a few "extra" holes from fixturing and a mistake on my part that I decided to make press in plugs for just to clean it up. as you can see in the one picture it fits perfect on the Miata Transmission. Tomorrow I plan on tack welding the assembly together.